[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100649680":3},{"organization":4,"armGroups":7,"interventions":19,"overallOfficials":24,"centralContacts":24,"locations":24,"responsibleParty":25,"collaborators":24,"id":29,"slug":30,"hasResults":31,"nctId":32,"briefTitle":33,"officialTitle":34,"acronym":24,"eligibilityCriteria":35,"healthyVolunteers":36,"sex":37,"minAge":38,"maxAge":39,"enrollmentInfo":40,"targetDuration":24,"studyType":43,"phases":44,"briefSummary":46,"conditions":47,"keywords":49,"overallStatus":50,"whyStopped":24,"lastUpdateSubmitDate":51,"lastUpdatePostDateStruct":52,"startDateStruct":55,"completionDateStruct":57,"leadSponsor":59,"locationsCount":24},{"fullName":5,"class":6},"University of Maia","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"familiarization","ACTIVE_COMPARATOR","familiarization group",[13],"Other: time to exhaustion",{"label":15,"type":16,"description":17,"interventionNames":18},"experimental","EXPERIMENTAL","Experimental group (2nd session)",[13],[20],{"type":6,"name":21,"description":22,"armGroupLabels":23,"otherNames":24},"time to exhaustion","Time to exhaustion performed at 95% VO2max",[15,9],null,{"type":26,"investigatorFullName":27,"investigatorTitle":28,"investigatorAffiliation":5,"oldNameTitle":24,"oldOrganization":24},"PRINCIPAL_INVESTIGATOR","Filipe Silvano Pinto Maia","Principal Investigator","100649680","effects-of-a-familiarization-protocol-on-time-to-exhaustion-performance-100649680",false,"NCT07735507","Effects of a Familiarization Protocol on Time to Exhaustion Performance","Effects of a Familiarization Protocol on Time to Exhaustion Performance Treadmill Running Protocol","Inclusion Criteria:\n\n* healthy and physically active\n\nExclusion Criteria:\n\n* current or recently injured participants",true,"ALL","18 Years","40 Years",{"count":41,"type":42},20,"ESTIMATED","INTERVENTIONAL",[45],"NA","Familiarization is widely recommended before exercise performance testing to improve measurement consistency and reduce learning effects. However, practical constraints often limit researchers to a single-or no-familiarization session, raising the possibility that improvements observed following an intervention may partially reflect increased familiarity with the testing procedure rather than genuine physiological adaptations. This issue may be particularly relevant for time-to-exhaustion (TTE) protocols, which have been reported to exhibit greater between-session variability than self-paced endurance tests.\n\nThis exploratory analysis examined the magnitude of the familiarization effect during treadmill TTE testing by comparing a familiarization trial with a subsequent experimental trial. Linear mixed-effects models will be used to evaluate changes in TTE performance while accounting for pre-exercise fatigue and recovery, and between-session agreement was assessed using intraclass correlation coefficients and Bland-Altman analysis.",[48],"Learning",[9],"NOT_YET_RECRUITING","2026-07-24",{"date":53,"type":54},"2026-07-30","ACTUAL",{"date":56,"type":42},"2026-09-01",{"date":58,"type":42},"2027-01-30",{"name":5,"class":6}]